Science

It was named after the German astronomer, Johannes Kepler.

The name comes from the legend of an arctic fox that ran north, spreading its tail sparks of fire shining in the moonlight.

It is about 109 times larger than the Earth and its mass is approximately 333.000 Earth masses. The Sun accounts for about 99.86 percent of the mass of the solar system.

Medium-intensity aerobic exercise is considered the most effective.

It is thought to consist of a combination of biological, psychological, and environmental factors.

Pygmies are said to be the most addicted to nicotine. In the Aka tribe living in central Africa, alm ...

It is used there to obtain silver halides (primarily silver bromide) used as photosensitive substances.

Once polished, it glistens and resembles a gemstone.

A two-hour flight by a Soviet astronaut outside the Earth's atmosphere took place in 1961.

It is also found in the ores: argentite (a rare mineral from the sulfide group), chlorargyrite (a ve ...